• A function machine uses a rule to change numbers.  You put a number into the machine. 

• The machine uses the rule to change the number.  The changed number comes out of the machine.

Example:

4           7

• If you put 2 into the machine, it will add 10 to 2.  The number 12 will come out.

• If you put 3 into the machine, it will add 10 to 3.  The number 13 will come out.

• If you put 7 into the machine, it will add 10 to 7.  The number 17 will come out.

• Write the numbers that are put into the machine in the in column.

• Write the numbers that come out of the machine in the out column.

 Remember:

Apply the rule to each number and record it on the chart.